| abstract |
The present invention relates to a base resin powder comprising a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partly neutralized acidic groups; And a surface cross-linked layer formed on the base resin powder, wherein the first cross-linked polymer has a BET surface area of at least 100 m < 2 > / g and a surface cross- / g or more, and a method for producing the superabsorbent resin. |